Limited access firewall

Hello,

I often play Fifa '11 online on my ps3.
Only now at firewall status there is always standing on "Limited" (in red color).
That the worst option.. after that you get average (yellow) and good (green).
Does anyone here know how I can fix this so my firewall status is better?
Its very hard to find a (good) match now.. and its often laggy.

I've already my uPnp (or something) switched on and use a DMZ server like people recommend @ several forums..
But all this dont work :)

Anyone an idea?

Thanks in advance people:)

edited 2011-09-07 23:02:42